Improvement in spring bed-bottoms



Lw. eHAFToN'eL. Lfm. GRANE.

l Y Spring Bed-Blittoms.

- Wa'lmesggf THE GRAPHIC CDA PHOTO'LITELRQA 4l PARK PLACEJLY l To alllwhom it may concern:

VUNITED STATES EDWIN W. GRAFTON ,AND LEWIs M. eItANn-orcmcAGO, ILLINOIS.

f, IMPRovEMENT-l-N SPRING eeoaorroms.

j" j ,speeifitaiionfprming part of Laefs Patent-Naflamsss,,datedAugust 25, 1874; application nied- May 21, 1874.

Be it known that we, EDWIN WQGRAFTON and LEWIs M. GRANE, ofthe city of Chicago, county of Cookand State of Illinois, have invented certain new and useful Improve-V ments in Spring Bed-Bottoms; and We do hereby declare that the following is a clearV and exact description of our invention, such as will enable others skilled inthe art to which it pertains to make and usev it, reference being had to the drawing forming part of this speciflcation, and in Which- Figure 1 is a bottom plan of a spring bedbottom having our improvement. j Fig. 2 is a side elevation of the same. Fig. 3 is an end elevation with the detachable half of one of the spring-holding crossbars removed to show the method of securing the springs, as hereinafter more fully described. Fig. 4 is a side view of one of the forms of sprin gs which we employ in our invention;l and Fig. 5 is a side view of another form of Vspring also used in our invention.

Similar letters of reference indicate corresponding parts in all the figures.

Our :invention consists in the peculiar con-l struction and arrangement of the frame'car# ryin g the slats to whichthe springs are affixed; and also, in combination with said frame, of the peculiar \conformation of the springs, all substantially as We shall now proceed to explain.

A denotes the slats, Which may be of any suitable length and Width, and varied in number. B is the springs, which are. secured to the under side of the slats in the usual manner. We prefer to use three springs on each slat, but a greater or smaller number maybe used Without deviating from the spirit of our invention. Some of the springs terminate in a straight projection or staple bent at its lower end into a U shape, and curved at right angles to the staple,`as shown at Fig. 4. On some of the springs, however, vas seen in Fig. 3, this double curvature is omitted, and the spring terminates simply in a straight staple or prolongation of the spring-wire. A spring so constructed is shown detached in Fig. 5.

The frame of our improved spring bed-bottom consists of'three cross-bars, G, D, and E, united by the connecting-bars F and G, which latter run parallel to the slats, crossing E at right angles. At the points of crossing, c, the bar E, and also the longitudinal bars F and G, are recessed or mortised sov as to t and clampeach other and prevent lateral or longi- .tudinalmotiom The end bars C and D consist each of twoseparate pieces, O'O' and D D', as shownv in the drawing. These are kept to'- gether by the tenons d ofthe bars F and G passing through corresponding mortises in G G and D D', and also by the clamps H, which straddle both pieces of each end crossbar and secure them to each other, as shown. In Fig. 3 the piece C has been removed, showing the other half, C, and the staples b of the springs B, which are laid bare by the removal of the piece C. Each of the four pieces constituting the end bars G and D is recessed vertically on the inside to afford room for the staples b of the springs B, as shown in Fig. 3;

and it will readily be perceived that when in their position, as shown'in the bottom plan,

Fig. 1, the two pieces clamp the staples of the springs, while the U-shaped angular projections a come below the bars, Where they serve to retain the staples and-prevent the springs from V"being drawn out of the recesses in the bars C D or Working' loose therefrom. c c c denote a series of perforations in the central cross-bar E, for the insertion of the staples of the middle row of springs, which are not provided With the projection a. Similarly the four end springs at f, Fig. 1, are left without this projection, so that they may be inserted through the krecesses made for their accommodation in O and D into and through corresponding holes Which perforate the tenons d of the beams F and G vertically.

By this arrangement, when the frame is made up, and the pieces C C and D D are brought together and properly clamped, all the projecting staples of the springs will be in position and accordingly be prevented from moving in any direction laterally, while such of the springs as areAv provided with the curved catch a are also prevented from moving up or down. These latter are suiiicient infnumber and are so distributed (as will be seen by reference to Fig. 1) that they will keep the entire series of slats immovably in their position on the frame, with no possibility of Working loose or getting out of order. grepresents` cords, which are stretched across'thc slats on their under side and run through each row of springs parallel with' and directly above`A the cross-bars C., D, and `E. Each slat is permanently secured to each of these three cords, which serve to keep theml an equal distance apart, besides serving to equalize and dis-` tribute the pressure'on the top of the slats. The ends of these cords are secured to hooks or staples in the ends seen in Fig. 3.

. To take our improved spring bed"-bottomV apart for shipping or cleansing, the cords g' are rst emptied froml the staples ll1., where they run from the slats down to the frame; the clamps H are next removed; the `pieces C and D are then removed, and the remainder of the frame maybe easily lifted'o' from and drawn out under'the springs. The slats may then be rolled up in a bundle, While the pieces' composing the frame are takenI apart and `laid together'longitudinally, when the Whole may be boxed or'tied up together, so that it will occupy but very little room. In putting up the spring bed-bottom this operation is sim'- .ply reversed.

Instead of the clamps H, screws or equivalent devices may be used forV keeping the pieces composing the end bars together.

Having thus described our invention, we

`claim and desire to .secure` by Letters Patent- In a spring bed-bottom, substantially as described, the combination of the springs 

